Projection apparatus



H. H. STRONG 1,762,802

PROJECTION APPARATUS June 1Q 1936.

5 Sheets-Sheet 1 Filed June 27; 1927 1 H. H. STRONG 1,762,

PROJECTION APPARATUS Filed June 27. 1927 s Sheets-Sheet 2 gwuento'o trdggqfwwd/w June w, 1930. H. H. STRONG I PROJECTION APPARATUSmmmm;mmwuquunum;mm mml f l l I l l l il 7 1:9 8 grvuvnfot Harry 510str0123 June 10, 1930.

H. H. STRONG PROJECTION APPARATUS Filed June 2'7. 192'? 5 Sheets-Sheet 4Il l June 10, 1930. H. H. STRONG 1,762,802

PROJECTION APPARATUS Filed June 27. 192'? Sheets-Sheet 5 illustration,

Patented June 10, 1930 UNITED STATES PATENT OFFICE HARRY n. STRONG, orronnno, 01110,

ASSIGNOR TO THE STRONG ELECTRIC CORPORA- v PROJECTION APPARATUSApplication .filed. June 27,

My invention relates to projection apparatus, and particularly to lampsfor pro ecting both motion picture and stereopticon slides, and theprincipal object of my invention is toprovide a new andimproved lamp ofthis type. In the drawings accompanying this specification and forming apart of this application I have shown, for purposes of one form which myinvention may assume, and in these drawings:

Figure is a front end elevation of the embodiment of my inventionillustrated herein showing the device in position for the projection ofmotion pictures; v

Figure 2 is a view similar to Figure 1 showing the device in positionfor the pro ectlon of stereopticon slides;

Figure 3 is a rear elevation;

Figure 4 is a side elevation taken from the right in Figuresl and 2, andfrom the left in Figure 3;

Figure 5 is a horizontal section taken on the line 5-5 of Figure 4;

Figure 6 is a section taken on the line 6-6 of Figure 4, showingparticularly the front carbon holder and the interior of the nose, andshowing the nose in motion picture projecting position;

Fi ure 7 is a view similar to Figure 6 but showing the nose instereopticon projecting position;

Figure 8 is a view similar to Figure 4 omitting parts to show moreclearly the front carbon supporting and operating means, and the carbonoperating mechanism;

a Figure 9 is a fragmentary section on the line 9-9 of Figure 4showingthe rear carbon support;

Figure 10 is a fragmentary section on the line 10-10 of Figure 9 showingthe connection between the rear carbon holder and the su porting frametherefor;

igure 11 is a view similar to Figure 4 omitting parts to show moreclearly the rear carbon operating and adjusting mechanism, and thecarbon operating mechanism;

Fi ure 12 is a detail showing the connection etween the hand and motordrives 'for the carbon operating mechanism;

Figure 13 is a section on the line 13-13 1927. Serial No. 201,908.

(of Figure 4) showingthe reflector and reflector support;

Figure 14 is a section on the line 1414 of Figure 13;

Figure 15 is a fragmentary view similar to Flgure 4 omitting parts toshow more clearly the reflector support and adjustment, showing thereflector in the position for motion picture projection;

Figure 16 is a fragmentary view similar to Figure 15 but showing theparts in the position for stereopticon projection; while Figure 17 is adetail showing ad usting the relation between the throw of the reflectorand of the nose between motion picture projecting position andstereopticon projecting position. Y

The lamp herein shown is enclosed in a housing 21 comprising plates 22and 23 provided with flanges 24 and 25 and united by suitable tierods 26and 27, a top 28 extending between the front and rear. end plates 22 and23 secured to the flanges 24 and 25 and further unitingthe front andrear end plates 22 and 23, side bases 29 also extending between thefront and rear end plates 22 and 23 secured to the flanges 24 and 2 5and further uniting the front and rearen'd plates 22 and 23, doors 3Opivoted on the tierods 27 and normally closing the space on the housing21 between the lower edge of the top 28 and upper edge of thecorresponding side base 29, and a pair of carrier rods 31 and 32 securedto the front and rear end plates 22 and 23, additionally uniting thefront and rear end plates 22 and 23, and reciprocably supporting a frontcar-- bon holder assembly 33, a rear carbon holder assembly 34, and areflector assembly 35.

Pivoted to the end of the carrier rod 31 forwardly of the front endplate 22 is a nose 36 overlying the projection aperture 37 in the frontend plate 22, provided with a motion picture projection aperture 38containing a lens 39 and adapted to be closed by means of a plate 40pivoted to the nose 36 at 41 and operable by means of a handle 42,provided also with a pair of apertures 43 for stereopticon projfictioneach having alined therewith a suita 'le slide holder 44 and each themeans for front and rear end adapted to be closed by means of a plate 45secured to a shaft 46 pivoted-in the correspondin slide holder 44 andoperable by means 0% a handle 47 provided with a Weight 48 effective tohold the plate 45 in either ex-v treme position to which it has beenmoved, and movable about the carrier rod 31 between the position shownin Figure 1 wherein the motion picture projecting aperture 38 1s alinedwlth the front end plate aperture 37 and the position shown in igure 2wherein the stereopticon projecting apertures 43 are alined with thefront end plate aperture 37'.

The front carbon holder assembly 33 comprises a base 50 provided at oneside with an ear 51 encircling the carrier rod 32, and at the other sidewith a fork 52 embracing the carrier rod 31, and carries secured theretob suitable machine screws 53 a plate 54 from which rises a carbonsupporting post 55 provided with a recess 56 in which the front carbon57 is held firmly clamped in position by means of a strap 58 securedintermediate its end by means of a machine screw 59 to the carbonsupportin post and acting to clamp the carbon 57 by movement of itsupper end 60 toward the carbon supporting post 55 and the carbon 57 asits lower end 61 is forced away from the carbon supporting post 55 bythe action of the tip 62 of a pin 63 screwthreadedly engaging within acooperatingly screw-threaded tube 64 carried by the plate 54, positionedwith its tip 62 bearlng against the lower end 61 of the strap 58, andoperated by means of a conveniently positioned handle 171.

The rear carbon holder assembly 34 comprises a substantially squareframe 65 provided at one lower corner with an ear 66 encircling thecarrier rod 32, and at the other lower corner with a fork 67 embracingthe carrier rod 31, provided intermediate its lower side 68 with adownwardly depending lug 69, and intermediate its'upper side 70 with asegmental spherical recess 71 receiving and supporting for universalmovement a cooperating segmental sphere 72 seated within the segmentalspherical recess 71 and provided centrally with an aperture 73 in whichis mounted an insulating sleeve 74 surrounding a rear carbon holder base75 carrying projecting from the forward end thereof carbon grippingfingers 76 and 77 effective to support between them the rear carbon 78.

The segmental sphere 72 is held in position seated in the segmentalspherical recess 71, and the segmental sphere 72 and rear carbon 78 areangularly adjusted relative to the frame 65 to aliue the rear carbon 78with the front carbon 57, by two separate and independent adjustingmeans operating together to secure the segmental sphere 72' seatedwithin the" segmental spherical recess 71, operating one to adjustthe-rear carbon .78 about a substantially vertical axis and the holdingsegmental sphere 72 about the substantially vertical axis comprises anarm 79 extending laterally from the segmental sphere 72, a tensionspring 80 extending between the end of'the arm 79 and the adjacent uppercorner 81 of the frame 65, an arm 82 extending laterally from thesegmental sphere 72 in the opposite direction from the arm 79 andprovided-at its end with a slot 83, and'an adjusting rod 84 provided atits end with a section 85 screw-threaded to cooperate with a threadedaperture 86 in the upper corner 87 of the frame 65, provided with areduced section 88 received within the slot 83 in the arm 82,reciprocable through a suitable aperture in the rear end. plate 23 topermit reciprocation of the rear carbon holder assembly 34 along thecarrier rods 31 and 32, provided at its rear end with an operatinghandle 89, and effective to draw the arm 82 toward the frame 65 againstthe action of the tension spring 80 until the rear carbon '78 hasassumed the desired lateral position; while the mechanism for adjustingthe segmental sphere 72 about the substantially horizontal axiscomprises an arm 90 extending upwardly from the segmental sphere 72, anarm 91 extending upwardly from the upper side 70 of the frame 65, atension spring 92 extending between the arm 90 and the arm 91, an arm 93extending downwardly from the segmental sphere 72 and provided at itslower end with a slot 94, and a rod 95 provided at its end with ascrewthreaded section 96 adapted to engage a cooperating screw-threadedaperture 97 in the arm 69 projectin downwardly from the lower side ofthe rame 65, provided with a reduced extension 98 received within theslot 94 of the arm 93, reciprocable through a suitable aperture in therear end plate 23 to permit reciprocation of the rear carbon assembly34,'provided at its rear end with an operating handle 99, and effectiveto draw the segmental-sphere arm 93 toward the correspondingly screw--relative to the are between the front and rear carbons 57 and 78 tojecting rearwardly of'the rear end plate 23,"

. carrier rod 31, and at the other lower corner within a cooperatinglyscrew-threaded aperof the nose 36, and adapted in another poture 102 inan arm 103extending downwardsition relative to the arc to reflect thelight ly and forwardly from the rear carbon supporting frame 65,provided over its rear portion with a rightehand-screw section 104 enthenose 36.

gaging within acooperatingly screw-thread- Y The segmental sphere 124 isheld in posied aperture 105 formed in an arm 106 extion within thesegmental spherical recess tending downwardly and rearwardly from123,and the segmental sphere 124 and the the base 50 of the front carbonholder asreflector 128 are adjusted universally relative sembly 33,directly operable by means of a to the reflector frame 119, by means oftwo handle 108 secured to an extension 109 proseparate and independentadjusting means together effective -to hold the segmental sphere 124seated within the segmental spherical recess 123, operating one toadjustthereflector 128 about a substantially vertical axis and the other toadjust the reflector 128 about a substantially horizontal axis, and the;two serving to provide conjointly universal adjustment of the reflector128 upon the reflector assembly frame 119.

The mechanism for adjusting the reflector 128 about the substantiallyvertical axis comprises a tension spring 132 extending between the uppercorner 133 of the frame 119 and the adjacent arm' 134 of. the spider126, and a rod 135 provided'with a screw-threaded section 136 engagingwithin a cooperatingly from the are as a parallel beam illuminating thestereopticonpro ecting apertures 43 of and impositively operable bymeans of an electric motor 110 connected to the screw unit 100 by anintermediate shaft 111 which is driven from the motor 110 by a worm 112carried on the motor shaft 113 engaging a cooperating worm gear 114carried on the er end of the intermediate shaft 111, and which drivesthrough a worm 115 carried on the lower end of the intermediate shaft111, engaging a cooperating worm gear 116 rotatable on the extension 109of the screw unit 100'but held in frictional engagement with the end ofthe right-hand-screw section 104 of the screw unit 100 by means of aspring 117 compressed between the handle 108 and the outer face of therear end plate 23 and tending to clamp the worm gear 116 between theright hand screw portion 104 and a ball-bearing unit 118 interposedbetween the worm gear 116\and the inner face of the rear end plate 23 toeliminate friction overlying the forward face of the spider arm betweenthe worm gear 116 and the rear end 141 adjacent the slot140,reciprocable through plate 23. a suitable aperture in the rear endframe 23 It will be understood by those skilled in to permit adjJustingreciprocation of the rethe art that the handle 108 will ordinarily beflector assem 1y 35, operable by means of a used in striking andadjusting the arc, and handle 143 disposed rearwardly of the rear thatthereafter the motor 110, controlled in end plate 23, and effective todraw the arm 141 any suitable manner, will operate to mainof the spider126 toward the uppercorner tain the arc in proper adjustment. 138 of theframe 119 against the action of the The reflector assembly35 comprises asub tension spring 132 to thus swing the reflector stantially squareframe 119 provided at one 128 about asubstantially vertical axis untilit has assumed the desired lateral position;

lower corner with an ear 120 encircling the while the mechanism foradjusting the reupper corner 138 of the frame 119, provided with areduced extension 139 extending through a slot 140 in the adjacent arm141 of with a fork 121 embracing the carrier rod 32, and providedintermediate its upper side 122 with a segmental spherical recess 123support- I ing a cooperating segmental sphere 124 universally movablewithin the segmental spherical recess 123, provided centrally with anaperture 125 for the free passage of the rear carbon 78, and carrying,by means of a spider 126, and fingers 127, a reflector 128 provided witha central aperture 129 for the passage of the rearcarbon 7 8, held inposition against the overhanging ends 130 of the fingers 127 by means ofa spring holding finger 131 secured to the spider 126 engaging the rearface of the reflector 128 and acting to move the reflector 128 forwardagainst the overhanging ends 130 of the fingers 127, adapted in oneposition tal axis comprises tending between the lowest portion of therim 145 'of-the spider 126 and the center of the lower cross'ibar 146 ofthe frame 119, an arm 147 ---extending upwardly from the central portionof the upper cross bar 122 of the vframe 119, and a rod 148 providedwith a screw-threaded section 149 engaging within a cooperatinglyscrew-threaded aperture 150 formed in the end of the arm 147, providedwith a reduced extension 151 extending through a slot 152 in an arm 153of the spider 126 and terminating in an enlarged head 154 overlying theinner face of the spider arm 153 adjacent the slot 152, reciprocablethrough a suitable aperture in the rear end plate 123 to permitadjusting reciprocation of the reflector 128, rovided at its rear endwith focus the light from the an operating han 1e 155, and effective todraw arc onto the lens 30 carried in the aperture 38 screw-threadedaperture 137 formed in the the spider 126 and terminating in a head 142I flector 128 about the substantially horizona tension spring 144 exthearm 153 of the spider 126 toward the arm 147 of the frame 119 to thusswing the reflector 12S upwardly against the action of the tensionspring 144 until thereflector 128 has assumed the desired verticalposition.

The reflector 128 is adjusted along the carrier rods 31 and 32 toproperly focus the light upon the lens 39 by means of a control rod 156rotatably and reciprocably mounted in the front and rear end plates 22and 23, provided with a screw-threaded extension 157 projectingforwardly of the front end plate 22, provided with a rear extension 158extending rearwardly of the rear end plate 23 and provided with frontand rear annular grooves 159 and 161, provided on the end of the rearextension 158 with an operating handle 160, normally held in extremerearward position by means of a detent 172 pivoted to the rear end plate23 at 173 and provided with a finger 49 adapted to seat within the frontannular groove 159 of the rear extension 158 of the controlrod 156,provided with a screw-threadedsection 162 engaging a cooperatinglyscrew-threaded aperture 163 in an arm 164 extending downwardly andrearwardly from the frame 119 of the reflector assembly 35, and operableto adjust the reflector 128 by reciprocation of the frame 119 andreflector 128 produced by rotation of the control rod 156 through thecoaction of the serew-threaded section 162 of the rod 156 and thecooperatingly screw-threaded aperture 163 in the arm 164 of thereflector assembly 35 This adjustment of the reflector 128 provides theadjustment necessary to focus the light beam upon the lens 39, and couldpro vide the adjustment'necessary to transform the light beam from abeam focused on the lens 39 for motion picture projection to a parallelbeam falling on the apertures 43 and 44 for stereopticon projection.Such an arrangement, however, would require not only prolonged effort tomove the reflector 128 from its focusing beam position to its parallelbeam position but in addition careful adjustment of the reflector 128upon such movement into either of these positions. The embodiment of myinvention herein shown provides means eliminating these difficulties bypermitting bodily forward move ment of the control rod 156 by raising ofthe detent finger 49 and to shift the reflector 128 into a forwardposition producing a beam suitable for stereopticon projection and inwhich the reflector is held by engagement of the detent finger 49 in therear annular recess'161 in the rear extension 158 of the control rod156. The embodiment of my invention herein shown also provides meanswhereby the shift of the control rod 156 and reflector 128 betweencinematographic projecting position and stereopticon projecting positionautomatically shifts the nose 36 between cinematographic projectingposition and stereopticon pro'ecting position, this means bein herein sown as an arm 166 depending rom the lower edge of the nose 36 andcarrying a roller 165 positioned to be engaged by a cone 167 providedwith a screwthreaded aperture 168 engaging the cooper- 7 of thereflector 128 necessary under the particular projection conditions underwhich the lamp may be operating, and held in adjusted position by meansof a lock screw 17 0 insertable within the screw-threaded aperture 168of the cone 167 into binding and locking engagement with the end of theextension 157 of the control 156. f

It will of course be understood that while the reflector 128 is incinematographic proj ecting position the nose 36 is held incinematographic projectin position by engagement of the cone 167 wit theroller 165, and that upon advance of the reflector 128 into stereopticonprojecting position the nose 36 will be moved to stereopticon projectingposition by gravity.

From the above description it will be obvious to those skilled in theart that I have provided a lamp for the projection of motion picturesand stereopticon slides embodying and providing improved light beam producing mechanism, improved reflector adjusting mechanism, and improvedrear carbon adjusting mechanism, and accordingly it will be obvious tothose skilled in the art that I have provided a lamp accomplishing atleast the principal object of my invention. At the same time it alsowillbe obvious to those skilled in-the art that the particularembodiment of my invention herein shown and described embodiesadvantages other than those particularly pointed out or suggestedherein, and also that this particular embodiment of my invention may bevariously changed and modified without sacrificing these advantages ordeparting from the spirit of my invention, and it therefore will beunderstood that the disclosure herein is illustrative only, and that myinvention is not limited thereto.

.I claim:

1. Projection apparatus comprising: a housing movablelight-beam-producing mechanism disposed within said housing, comprisinglight-producing means, comprising also movable reflector meanscooperating with said light-producing means to produce a light beam, andvariable b movement of said reflector means to vary t e focus of saidsaid light-producing means to pro light-:beam; movable nose mechanismconnected to said housing, provided with a pair of openings for thepassage of light therethrough, and movable between a position-in whichone of said openings is in operative relation to said light beam and aposition in which the other of said openings is in operative relation tosaid light beams; and means whereby such movement of said reflectormeans automatically effects such movement of said nose mechanism.

2. Projection apparatus comprising: a housing; movablelight-beam-producing mechanism' disposed within said housing, comprisinglight-producing means, comprising also reflector means cooperating withuce a light beam and movable towardand from 7 said light-producingmeans, and variable by mechanism automatically efiects such movehousing;

.mechanismdisposed within said housing ment of said nose mechanism.

3. Projection apparatus comprising: a movable light-beamproducingmovable to vary a characteristic of the utilized light beam producedthereby; movable nose mechanism connected to said housing,

provided with a pair of openings for the passage of light therethrough,and movable between a position in which one of said openings is inoperative relation to said light beam and a position in whichthe otherof said openings is in operative relation to said light beam; f andmeans whereby such movement of said light-beam-producing mechanismautomatihousing; movab cally eiiects. such movemc mechanism. e I

4. Projection a paratusJ-comprising: -,-a.

l light-beamreducing mechanism disposed within ='s ai housing movable tova the focus" f the'utilized 1i ht beam produce thereb movablenose mecanism connected to said ousing, provided with a pair of openingsfor-thepassageid light" t of said nose tion in whichone of saidopeningsfisin operative relation to'said li htbea'r'jn and a position inwhich the other 0 said 0 nings is in opcrative relation to said lightcam; and means whereby 'such movement of said light-beamproducmgmechanism automatic 1y. eflects vsuchmoveme'nt of said nose mechanism."j

5. Projection apparatus comprising; a,

n .In testimony whereof I her' housing; movable light-beam-producingmechanism disposed within said hous ng, comprising light-producingmeans, comprisin also reflector means cooperating with said,

lig t-producing means to produce alight beam, said light-producing meansand said reflector means being relatively movable toward and from eachother, and said lightbea'm-producing mechanism being variable byrelative approach and recession of said lightproducing means and saidreflector means to vary the focus of said light beam; movable nosemechanism connected to said housing,

provided with a pair of openings for the passage of light therethrough,and movable between a position in which one of said openings is inoperative relation to said light beam and a position in which the otherofsaid openings is in operative relation to said light beam; and meanswhereby such movement of said light-beam-producing mechanismautomatically mechanism.

so Y

effects such movement of said nose 6. Projection apparatus comprising:a-'

housing; 1 movable light-beam-producing mechanism disposed withm saidhousing movable to vary a characteristic of the utilized light beamproduced thereby; movable nose .mechanism connected to said housing,provided with a pair of openings for the passage of light therethrough,and movable-between a position in which one of said openingsis inoperative relation'to said light beam and a position in which the otherof said openings is in operative relation to said light beam; and

means whereby such movement of said lightbeam-producing mechanism ineach direction. automatically effects such movement of said i nosemechanism in the corresponding direc- 7 tion.

7, Projection housing mechanism movable disposed within sai lized lightbeam produced thereby; movable apparatus comprising: "a jlight-beamroducing': a

housing movable to vary a characteristicof the'utl- 11o nose mechanismconnected to said housing, 7

provided with a pair of openings-for the pas- 1' sage of lighttherethrough, and movable bej tween a position in which one of saidopenings is in operative relation to: said light beam {and a position inwhich the other of said openingsis in operativerelation to" said lightsaid f light-beamsproducing mechanism in each direction" (automaticallyefie'ctsg such beam ;*and means whereby such movement of] 120 movementof said nose mechanism. inthe 1 same direction, in one direction} by.positive actuation of sai and in th'other direction byrpermittingactuation of said other of saidmechanisms by a'biasingfmeansacting'thereon,

signature. HARRY H.-,STBONG.

dotheriof'said mechanisms, 7'

"toa'fiix m

